Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Keyless Access System Symptom Troubleshooting - Cannot select ON mode with keyless access, but can select ON mode with the keyless remote touching the engine start/stop switch
- Keyless access system check 1
-1. Push the LOCK and the UNLOCK buttons of the keyless remote, and check if the LED on the keyless remote comes on.
Does the LED come on?
YES
Go to step 2.
NO
Replace the keyless remote battery and recheck the system. If the symptom does not go away, replace the keyless remote.
- Keyless access system check 2
-1. Touch the engine start/stop switch with the keyless remote. The buttons on the keyless remote should be facing you.
-2. Turn the vehicle to the ON mode.
-3. Select KEYLESS ACCESS CONTROL UNIT from the ONE-PUSH START system select menu with the HDS, and enter SELF CHECK.
One-Push - KEYLESS ACCESS CONTROL UNIT - SELF CHECK
Does the system communicate with the HDS?
YES
Go to step 3.
NO
- PCU DTC check
-1. Check for PCU DTCs with the HDS.
DTC (POWER CONTROL UNIT)
DTC Description DTC Are any DTCs indicated?
YES
Go to indicated DTC troubleshooting .
NO
Go to step 4.
- Keyless access DTC check
-1. Check for keyless access/TPMS control unit DTCs with the HDS.
DTC (KEYLESS ACCESS CONTROL UNIT)
DTC Description DTC Are any DTCs indicated?
YES
Go to indicated DTC troubleshooting .
NO
Go to step 5.
- Backup DTC check
-1. Check for backup control unit DTCs with the HDS.
DTC (BACKUP CONTROL UNIT)
DTC Description DTC Are any DTCs indicated?
YES
Go to indicated DTC troubleshooting .
NO
Go to step 6.
- Keyless access system check 3
-1. Select HISTORY DATA from the KEYLESS ACCESS CONTROL UNIT mode menu with the HDS.
One-Push - KEYLESS ACCESS CONTROL UNIT - History data/Clear
-2. Select HISTORY CLEAR, and back to TEST MODE MENU.
-3. Turn the vehicle to the OFF (LOCK) mode.
-4. Touch the engine start/stop switch with the keyless remote. The buttons on the keyless remote should be facing you.
-5. Turn the vehicle to the ON mode.
-6. Select HISTORY DATA from the KEYLESS ACCESS CONTROL UNIT mode menu with the HDS.
One-Push - KEYLESS ACCESS CONTROL UNIT - History data/Clear
History Data
ENGINE START/STOP SWITCH 1 (+) ON ENGINE START/STOP SWITCH 2 (-) ON Is all the information ON?
YES
Go to step 8.
NO
Go to step 7.
- Open wire check (SS1+, SS2- lines)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connectors.
Engine start/stop switch 12P connector Keyless access/TPMS control unit connector B (36P)
-3. Check for continuity between test points 1 and 2 respectively.
Test condition Vehicle OFF (LOCK) mode Engine start/stop switch 12P connector: disconnected
Keyless access/TPMS control unit connector B (36P): disconnected
Test point 1 Keyless access/TPMS control unit connector B (36P) No. 10 Test point 2 Engine start/stop switch 12P connector (female terminals) No. 7: Test point 1 Keyless access/TPMS control unit connector B (36P) No. 11 Test point 2 Engine start/stop switch 12P connector (female terminals) No. 6: Is there continuity?
YES
The SS1+ and SS2- wires are OK. Replace the keyless access/TPMS control unit .
NO
Repair an open or high resistance in the wire.
- Keyless access system check 4
-1. Select KEYLESS TRANSMITTER from the BODY ELECTRICAL SYSTEM SELECT menu, then select FUNCTION TEST, then KEYLESS CHECK.
FUNCTION TEST - Keyless Check
Do the KEYLESS CHECK with the HDS using the all keyless remotes.
Is DIFFERENT KEYLESS ENTRY TRANSMITTER CODE IS RECEIVED indicated?
YES
Go to step 10.
NO
Go to step 9.
- Keyless remote check (substitution)
-1. Substitute a known-good keyless remote, then recheck the system.
Does the system change to ON mode?
YES
Register the keyless remote , and recheck. If the symptom does not go away, replace the keyless remote.
NO
- Keyless remote check (substitution)
-1. Substitute a known-good keyless remote, then recheck the system.
Does the system change to ON mode?
YES
Register the keyless remote , and recheck. If the symptom does not go away, replace the keyless remote.
NO
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.